100131223281 has 16 divisors (see below), whose sum is σ = 141076469760. Its totient is φ = 63043540560.

The previous prime is 100131223279. The next prime is 100131223321. The reversal of 100131223281 is 182322131001.

It is not a de Polignac number, because 100131223281 - 2¹ = 100131223279 is a prime.

It is a super-2 number, since 2×100131223281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100131223211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9179215 + ... + 9190116.

It is an arithmetic number, because the mean of its divisors is an integer number (8817279360).

Almost surely, 2^100131223281 is an apocalyptic number.

It is an amenable number.

100131223281 is a deficient number, since it is larger than the sum of its proper divisors (40945246479).

100131223281 is a wasteful number, since it uses less digits than its factorization.

100131223281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18369436.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 100131223281 its reverse (182322131001), we get a palindrome (282453354282).

The spelling of 100131223281 in words is "one hundred billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred eighty-one".